*{
    margin:0;
    padding:0;
    font-family: 微软雅黑;
}
li{
    list-style: none;
}
a{
    text-decoration: none;
    color:black
}
.clearfix{
    zoom:1;
}
.clearfix:after{
    content:"";
    display:block;
    visibility: hidden;
    clear:both;
}
.safe_view{
    width:1200px;
    margin:0 auto
}